Method of repairing castings



y 1942- L. D. KIRBY 2,291,162

METHOD OF REPAIRING CASTINGS Filed April 15, 1940 Patented July 28, 1942 UNITED STATES PATENT OFFICE 2,291,162 METHOD OF REPAIRING cas'rmcs Lonnie Dee Kirby, Burger, Tex. Application April 15, 1944i Serial No. 329,797 2 Claims. (Cl. 29-448) This invention relates to a method and means of repairing castings and the like, and has for one of its objects the production of a simple and eflicient method of producing a perfect water-tight cold locked seal for engine cylinder blocks, heads, etc.

A further object of this invention is the production of a simple and efficient means for producing a. cold locked seal for engine cylinder blocks, heads, etc. whereby a continuous level can be maintained with all broken joints covered-and the ends of all looks held in complete abutting relation to insure a water-tight seal.

Other objects and advantages of the present invention will appear throughout the following specification and claims.

In the drawing:

Figure 1 is a top plan view of the cold locked seal illustrating the manner in which the broken joint of an engine cylinder block, head, etc. is sealed;

Figure 2 is a sectional view taken on line 22 of Figure 1;

Figure 3 is a longitudinal sectional view taken Figure 9 is a section taken on line 9-9 of Figure 4;

Figure 10 is a plan view of a portion of a cylinder block illustrating the manner in which the block is cut out toreceive the locks;

Figure 11 is a transverse sectional view through a portion of a cylinder illustrating the method of placing the lock in position;

Figure 12 is a top plan view of a portion of a cylinder block illustrating a modified arrangement of locks;

Figure 13 is a sectional view taken on line 13-13 of Figure 12;

Figure 14 is a longitudinal sectional view through a series of locks illustrating the manner of anchoring the locks by means of cap screws;

Figure 15 is a perspective view showing a partial assembly of one arrangement of a series of locks and showing the manner in which they may be arranged in stacked relation to build up a series of layers.

By referring to the drawing, it will be seen that [0 designates an engine cylinder block, head or the like, having a crack or other broken portion II. In carrying out my invention, I cut out the cylinder head for a suitable distance on either side of the crack or broken portion II to a suitable depth, and at a .suitable width to provide a lock-receiving channel [2 of a suitable design to receive the specially designed locks which are adapted to be embedded within the channel l2.

The channel i2 is then filled with locks of a suitable design to register with the design of the sides of the walls of the channel, such as is 11- lustrated in Figure 1, and these locks preferably comprise special stamped sheet metal members formed of nickel alloy of a suitable type which will possess a maximum strength and a minimum expansion necessary to hold the broken or cracked portion of the cylinder head ill in a sealed condition. The locks are formed as stated above in various designs and for the purpose of description attention is called'to Figure 4 which illustrates one typical example of lock. The lock illustrated in Figure 4 comprises a body l3 which is preferably concave-convex in cross-section. The lock I3 is provided with a knob-like end l4 which is concavo-convex or dished and is also provided with an intermediate knob portion IS. A series of these locks may be placed within the channel I! in laminated relation, such as is shown in Figure 3, and the knob-like portions l4 and I5 are provided with apertures 16 and I! respectively, through which may be extended suitable cap screws for fixing the locks in position and preventing accidental displacement. These locks l3, as stated above, are preferably concavoconvex in cross-section and these locks are placed in the ehannel I2 in this concavo-convex position such as is shown in Figure 11, and a suitable instrument is employed for forcing the locks within the channel thereby driving the edges l8 firmly against the side walls of the channel l2 in jamming relation,'and then a second set of locks may be placed in superimposed relation within the channel l2, and flattened to the position shown in Figure 2.

Suitable cap screws l9 are, or may be, inserted through the apertures I6 and I1 to firmly anchor the locks in position within the channel I 2. In carrying out the invention, the series of locks shown in Figure 4 is arranged in end-to-end position, such as is shown in Figure 1, the knob portion ll abutting against the circular notched end 20 of the lock l3.

The locks may be arranged in varied selected positions and where desired, a cross-tie lock 2| maybe employed, as showninl'isure 1, having opposite concave-convex knob portions 22 and right-angularly extending ends 28 which are adapted to snugly engage the rounded knob portions ll of the locks II, in thisway providing an eilicient cross-tie lock. This cross-tie lock II is also concavo-convex in cross-section, and is illustrated in detail in Figure 5.

InFiguredIhaveshownaflll-inlockll ofa link-like structure which is also concave-convex in cross-section, this fill-in lock comprising a central shank and having a knob-like portion It at each end.

As shown in Figures 12 and 13, the locks may be arranged in superimposed relation so as to have the adjoining end of the series 01' locks alternately overlapping at their ends merely by placing the reversible locks in alternate reverse position.

In Figure 14, I have shown a modified type of invention wherein a series of locks is arranged in laminated relation and illustrating the manner in which the locks may be anchored in position by means of a cap screw or cap screws 26, passing through the locks of the type 24, shown in detail in Figure 6, the ends of the cap screws being adapted to fit in the threaded sockets 21 formed in the inside wall of the cylinder to provide an efiicient anchoring means for the cap screws.

It should be understood that various designs may be employed and various arrangements may be provided, by using a suitable combination of locks, such as illustrated in Figures 4, 5 and 6, and that the channel I! may necessarily be cut to this design to permit these locks to properly fit and provide interlocking relation within the channel i2. The type of lock shown in Figure 4 may be arranged in reverse relation and these locks may be either directly superimposed, or they may be arranged in staggered relation to cause their ends to alternately overlap. It is necessary, however, that the locks be arranged to provide complete and positive abutting relation at their ends to produce a jam-fit, and to insure a water-tight seal. The formation of the locks in concavo-convex shape will permit the locks to be placed in the channel l2, and then flattened to insure tight fit therein and the shape of the locks will tend to firmly hold broken or cracked elements in a rigid condition, and these locks may in turn be anchored through the medium of the cap screws described. It has been found important, howeventhat it is necessary that the locks be formed of a nickel alloy of suificient strength and a minimum expansion in order that a complete and satisfactory water-tight seal be provided. The particular type of lock illustrated provide a concavo-convex structure which may be flattened into position, certain portions being Having described the invention, what I claim 1. A method for closing cracks in castings and the like, which comprises drilling spaced sockets in the casting in a line generally along the line of the crack, cutting a channel oi less width than the sockets upon opposite'sides of the line 0! the crack to connect the sockets, then forming threaded holes in the bottom oi the sockets of smaller diameter than the sockets, placing a laterally expansible metallic inlay shaped to ilt the channel and sockets in the channel and sockets, then laterally expanding the inlay within the channel and sockets to cause the edges of the inlay to Jam into the sides oi the channel and sockets in a manner to jam the inlay in place in the channel and sockets to prevent removal oi the inlay and to resist longitudinal movement of the inlay, and then inserting threaded pins through the ends 01 the metallic inlay and into the threaded holes.

2. A method for closing cracks in castings and the like, comprising drilling a plurality of spaced sockets in the casting in a line generally along the line of the crack, cutting a channel 0! less width than the sockets upon opposite sides 01' the line of the crack and between the sockets to connect the sockets, placing a laterally expansible metallic inlay having a shank and knob portions, the shank fitting in the channel and the knob portions fitting in the sockets, placing the knob portion of one inlay in overlapping relation with respect to the knob portion or the adjoining inlay in a manner whereby the ends of the inlays alternately overlap to provide a continuous chain-like crack-closing means, then laterally expanding the inlays within the channels and sockets to jam the inlays in binding engagement with the sockets and channels, then inserting an anchoring pin through the overlapping ends of the inlays and into the casting.

LONNIE DEE mar. 

